National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
1F32AI116355-01
米国
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
UM-1- AI100645
米国
引用
ジャーナル: Sci Transl Med / 年: 2017 タイトル: Staged induction of HIV-1 glycan-dependent broadly neutralizing antibodies. 著者: Mattia Bonsignori / Edward F Kreider / Daniela Fera / R Ryan Meyerhoff / Todd Bradley / Kevin Wiehe / S Munir Alam / Baptiste Aussedat / William E Walkowicz / Kwan-Ki Hwang / Kevin O Saunders ...著者: Mattia Bonsignori / Edward F Kreider / Daniela Fera / R Ryan Meyerhoff / Todd Bradley / Kevin Wiehe / S Munir Alam / Baptiste Aussedat / William E Walkowicz / Kwan-Ki Hwang / Kevin O Saunders / Ruijun Zhang / Morgan A Gladden / Anthony Monroe / Amit Kumar / Shi-Mao Xia / Melissa Cooper / Mark K Louder / Krisha McKee / Robert T Bailer / Brendan W Pier / Claudia A Jette / Garnett Kelsoe / Wilton B Williams / Lynn Morris / John Kappes / Kshitij Wagh / Gift Kamanga / Myron S Cohen / Peter T Hraber / David C Montefiori / Ashley Trama / Hua-Xin Liao / Thomas B Kepler / M Anthony Moody / Feng Gao / Samuel J Danishefsky / John R Mascola / George M Shaw / Beatrice H Hahn / Stephen C Harrison / Bette T Korber / Barton F Haynes / 要旨: A preventive HIV-1 vaccine should induce HIV-1-specific broadly neutralizing antibodies (bnAbs). However, bnAbs generally require high levels of somatic hypermutation (SHM) to acquire breadth, and ...A preventive HIV-1 vaccine should induce HIV-1-specific broadly neutralizing antibodies (bnAbs). However, bnAbs generally require high levels of somatic hypermutation (SHM) to acquire breadth, and current vaccine strategies have not been successful in inducing bnAbs. Because bnAbs directed against a glycosylated site adjacent to the third variable loop (V3) of the HIV-1 envelope protein require limited SHM, the V3-glycan epitope is an attractive vaccine target. By studying the cooperation among multiple V3-glycan B cell lineages and their coevolution with autologous virus throughout 5 years of infection, we identify key events in the ontogeny of a V3-glycan bnAb. Two autologous neutralizing antibody lineages selected for virus escape mutations and consequently allowed initiation and affinity maturation of a V3-glycan bnAb lineage. The nucleotide substitution required to initiate the bnAb lineage occurred at a low-probability site for activation-induced cytidine deaminase activity. Cooperation of B cell lineages and an improbable mutation critical for bnAb activity defined the necessary events leading to breadth in this V3-glycan bnAb lineage. These findings may, in part, explain why initiation of V3-glycan bnAbs is rare, and suggest an immunization strategy for inducing similar V3-glycan bnAbs.